Service manual

19" LCD Color Monitor ASUS VB191T&S
43
(2). No Picture
No
p
icture
OK
OK
NG
NG
Replace D701, U701 or U702
X401 oscillate waveforms are normal
Replace X401
Check if the sync signal from
computer is output and video cable
Input the sync signal of
computer, or change
Replace U401
NG
OK
Measure U701 PIN2=3.3V
Measure U702 PIN2=1.8V